WO2020065103A1 - Système et procédé pour l'entretien d'une éolienne - Google Patents

Système et procédé pour l'entretien d'une éolienne Download PDF

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Publication number
WO2020065103A1
WO2020065103A1 PCT/ES2018/070629 ES2018070629W WO2020065103A1 WO 2020065103 A1 WO2020065103 A1 WO 2020065103A1 ES 2018070629 W ES2018070629 W ES 2018070629W WO 2020065103 A1 WO2020065103 A1 WO 2020065103A1
Authority
WO
WIPO (PCT)
Prior art keywords
tower
structural system
crane
wind turbine
elements
Prior art date
Application number
PCT/ES2018/070629
Other languages
English (en)
Spanish (es)
Inventor
Carlos COLINO LLAMAS
Original Assignee
Colino Llamas Carlos
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Colino Llamas Carlos filed Critical Colino Llamas Carlos
Priority to PCT/ES2018/070629 priority Critical patent/WO2020065103A1/fr
Publication of WO2020065103A1 publication Critical patent/WO2020065103A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/50—Maintenance or repair
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • This invention is related to the maintenance and replacement of components in wind turbines.
  • it defines a system and method for placing and supporting a crane in a modular structure.
  • This system is made up of prefabricated components that are assembled together to assemble the structure.
  • This crane can be used for maintenance work or to perform a component change on a wind turbine.
  • This invention also defines the adaptations necessary to be made in the wind turbine tower to be able to connect the structural system described in this invention with the wind turbine tower.
  • This invention defines ways of fixing the structural system to the wind turbine tower.
  • This invention finally describes the modifications to be made in the design of the wind turbine tower to simplify its connection with the proposed structural system in future wind turbines.
  • Wind turbines are generally made up of a metal or concrete tower that supports the nacelle and the blades. Sometimes it is necessary to replace some components and for this it is necessary to use cranes with the necessary load capacity and reaching the required height.
  • WO2014 / 071949 discloses the use of a crane that is mounted on the nacelle avoiding the use of cranes on the ground.
  • This invention has several disadvantages that must be solved such as the need to design specific supports for each type of turbine, the need to hoist the components of the crane to be used with the limited means available in the nacelle and the fact that they transmit loads raised to the nacelle for which they are not designed.
  • These scaffolding, falsework and similar structures are modular systems, usually made up of basic elements such as uprights, horizontal components such as stringers or crossbars and optionally diagonals. Typical characteristics of these structures are their ease of assembly and their versatility.
  • WO2017 / 207263 describes a modular formwork using prefabricated tubular elements that are connected to each other by means of plugs for the upright-upright connections and by means of rosettes that, fixed to the uprights, serve as accommodation for wedges located at the ends of the rest. Mainly horizontal and diagonal, of elements to connect with the uprights.
  • Typical components in a modular scaffolding system also include work platforms and access with ladders or railings.
  • wind towers have not been used as a support for horizontal loads of modular systems based on prefabricated components in which loads are transmitted through a large number of connections with relatively low transmitted loads in each of them.
  • DE102016102213A1 describes in figure 5 and figure 6 several fixings of a tower crane to a wind tower by means of a system placed at the height of the joints of the sections of the wind tower and not along the entire section.
  • This invention has several shortcomings since it does not define the connection between the wind tower and the plates that hold the connecting element.
  • the design of the complete system does not allow the installation of the connection without the help of lifting equipment to access the fixing point or handling elements for both the connection element and the fixing bolt.
  • This invention or other similar ones for fixing tower cranes allow the transmission of high loads, but are not suitable for fixing elements based on modular systems such as scaffolding or falsework. These latter systems require a large number of connections given their low rigidity compared to tower cranes.
  • This invention discloses a system for the use of a crane for use in wind turbines that is supported by a modular system consisting mainly of prefabricated elements, preferably tubular.
  • This system is assembled on site by technicians and its main characteristics are its ease of assembly and its versatility and to assemble different configurations, adapting for example to the geometry of the terrain, the taper of the tower or other geometric and load conditions.
  • the described structure is made up of precast components similar to those used in a scaffolding or falsework system in the construction sector.
  • the structure can be reinforced with smooth tubes fixed to the structure by means of flanges in a similar way as it is done on scaffolding or falsework in the construction field.
  • the elements used allow their manipulation by technicians without the need for cranes located on the ground regardless of the height at which they are mounted.
  • the structural system is preferably assembled piece by piece, forming modules and growing in height. As the height increases, the fixings are connected to the tower. For access to the different heights of the structural system it is possible to include in the design of the same a module with access stairs.
  • the structural system can be assembled in blocks previously assembled on the ground and lifted with a crane, received by operators at height to assemble and fix them to the wind tower. This system is much faster, but requires the use of a crane located on the ground.
  • the maximum height of the structural system is limited by the ability to make the connections that allow the horizontal loads to be transmitted to the wind turbine.
  • This invention preferably describes the maximum height of the structural system as the height that, in case of rotation of the nacelle, this or some other element such as the blades do not hit the structural system.
  • the crane rises above the nacelle just to carry out the maintenance or component change operation and will withdraw once it has been completed, leaving the structural system that supports it below the nacelle.
  • the fixings of the structural system are connected to the wind tower.
  • This invention also describes the possibility that the maximum height of the structural system exceeds the nacelle.
  • This configuration has the advantage that the The size of the crane used for the maintenance or change of the component is smaller and lighter since it does not need a mast as long as in the previous option.
  • this requires that the nacelie cannot rotate if necessary as it would collide with the structural system. It also fixes the structural system in two parts of the turbine that can rotate with each other. In both cases this poses a security risk if there is relative movement between tower and nacelie.
  • the structural system in addition to the necessary connections in the wind turbine tower, the structural system can be fixed to the nacelie or to the hub.
  • the first method of attaching the structural system to the nacelie is to drill one or more holes in the side panel of the nacelie to pass the connections that connect the structural system to the nacelie.
  • the second method of fixing the structural system to the nacelie is to assemble inside the nacelie a structure that protrudes above it and is prepared to connect it to the structural system.
  • the structural system disclosed in this invention is fixed to a multitude of points on the tower, distributed at more or less regular intervals, to withstand horizontal loads. These connections should be made as the structural system reaches the height where the connections are to be placed.
  • connection element will preferably be a tubular profile with the necessary adaptations at the ends.
  • This invention also discloses the use of cables, slings or similar elements for fixing the structural system to the wind turbine tower.
  • the cable, sling or the like is connected to the tower by surrounding it and to an element of the structural system and is tensioned by means of a built-in tensioner.
  • connecting elements mainly transfer horizontal loads, allowing vertical loads to be transmitted to the foundation by means of studs. This is due to the fact that the gaps and lack of rigidity of these systems do not allow correct control of the vertical load that would be transmitted to a fixture in the tower, being able to overload the support and causing its failure and even that of the entire structure.
  • connection element for fixing to the structural system can be of different types such as flanges, wedge joints or even bolted. This type of endings are widely used in scaffolding in the construction sector.
  • connections will be used that, transmitting the expected horizontal forces, avoid or minimize the transmission of vertical forces.
  • This invention discloses various options for making the necessary adaptations in the wind turbine towers already installed to be able to fix the structural system using the types of connections and their terminations described above. This definition of adaptations is necessary to guarantee the correct transmission of loads from the structural system to the wind tower and to do it quickly and easily.
  • this invention describes the preparation of the point of the tower that will receive the termination of the connection element in the tower of the wind turbine by placing a plate, preferably with threaded holes, in the tower on which it is It will fix the connecting element that will receive the completion of the connection element between the structural system and the wind turbine tower, either directly or through intermediate plates.
  • the fixing of the plates to the tower can be carried out in different ways depending on the type of tower, among which are: welded, glued or screwed, the latter more frequently in the case of concrete towers.
  • the plates may have the necessary curvature to better fit the wind turbine tower.
  • This invention secondly describes the realization of holes, preferably threaded, but also through holes, directly in the wind tower to fix the support that allows fixing the end of the connection element that connects to the wind tower.
  • This invention thirdly describes a system for fixing the connection elements between the structural system and the wind turbine tower by means of a support on which a profile is preferably fixed, by means of a half flange, but also by other methods such as screwing. tubular.
  • These supports can be fixed to the plates described in point 1 but also directly to the tower by any method.
  • Preferably a circular tube will be used but it is also possible to use profiles of other geometries, such as, for example, square or triangular.
  • By placing several supports on the same vertical it is possible to install a tube that is fixed to the tower at two or more points.
  • By placing several vertical tubes one after the other it is possible to fix the structural system at any height of the tower in a quick and simple way.
  • This system not only allows fastening of the structural system to the wind turbine tower at any height, but also allows fastening in different directions so that loads that are tangential to the wind tower can be counteracted and not They can transmit by traction or compression with connecting elements directly.
  • connection element of the structural system that is fixed to the wind turbine tower will be connected to this tube, and this connection can be of different types, preferably by means of a flange.
  • the connections allow receiving horizontal loads and in turn can slide on the tubular profile to avoid or at least minimize the absorption of vertical loads.
  • This invention fourthly defines a system based on system 3 in which the flanges do not align vertically, but do so in another direction.
  • the connection tube can be curved or the fixings can be adjusted by means of spacers between the plate and the flange to compensate for the curvature of the tower.
  • This system is suitable for preparing connections to the tower at specific heights where high horizontal loads are estimated to be transmitted to the tower.
  • the pipes held by the flanges will preferably be disassembled once the structural system is dismantled for maintenance reasons, the plates remaining in case it is necessary to carry out another operation in the future. maintenance or component change.
  • this invention defines a system based on cables, slings or the like, that surround the wind turbine tower at a certain height and are tensioned to fix them to the tower.
  • Various shackles, hooks or carabiners have been previously introduced into this cable, sling or the like that allow other cables, slings or the like to be attached to that element. This is so because these elements are fixed between the tower and the cable, sling or similar that surrounds the tower.
  • This invention defines in sixth place a system based on the placement of cylindrical pins, preferably welded, but also glued or screwed, in the tower so that the connection element of the structural system can be subsequently connected by means of a termination with a hole that fits on the pin.
  • a pin will be placed to prevent it from leaking.
  • the design of the pieces that will receive the connection element can be very varied. Eyebolts with a hole or specially shaped pieces will preferably be used to support tubes that transmit compression forces, defined as those that go from the structural system to the tower and that compress the connection element.
  • the preparation of the wind turbine tower to receive the elements of connection with the structural system is a process that is necessary and that in general will be carried out only once since the preparation can be reused for future occasions when it needs to be carried out. a new maintenance or component change operation.
  • this process is time consuming and slows down the erection process of the structural system, so it is convenient to define a solution to avoid having to do it with the turbine already installed.
  • This invention discloses the preparation of the tower during its production process or in any case before the complete erection of the turbine, to receive the connections.
  • This preparation may include any of the above described on-site tower preparation systems 1 to 6, with the advantage that it is not necessary to do so in unfavorable altitude or atmospheric conditions. They will preferably include plates welded to metal towers and screwed or embedded in the case of concrete towers, but the solutions described above are also possible in the case of on-site preparation.
  • the tubes indicated in preparation systems 3 and 4 can be assembled on site to optimize their maintenance.
  • This invention discloses a method of compensating for eccentric or horizontal loads, which can lead to overturning of the structural system or overloading of part of the uprights of the structural system shown. For this, a system of introduction of additional loads is defined that partially compensates the mentioned actions.
  • the load exerted by these cables will be controlled in order to optimize the structure behavior! of the system described in this invention.
  • a drum can be used that collects the cable and is powered by a motor that allows controlling the torque exerted, albeit indirectly.
  • a third option, preferably in vertical cables, is to suspend a defined mass of them so that the force transmitted by that cable is defined.
  • this invention describes the use of cables that are attached on one side to the top of! structure system! and on the other at a distance from the tower, so that the cable is the hypotenuse of the triangle formed by the height of the structural system to which the cable is attached and the horizontal distance of the second point of attachment of the cable to the structural system. Tensioning this cable, preferably with a controlled force, will introduce into the structural system a force that can be decomposed into a vertical compression component and a horizontal force that must compensate for the momentum generated by eccentric or horizontal loads.
  • this invention describes the use of cables in a similar way to the description 1 in which the cables are not inclined but vertical, being fixed in supports located at the base of the structural system.
  • This system has the disadvantage that the capacity to counteract eccentric loads is less, but it has the advantage that no additional space is needed around the wind turbine. It is possible to use a bracket of! Modular system to increase the eccentricity of this load.
  • the support at the bottom can be fixed either to the structural system, self-supporting system, to the foundation or to the tower itself, for example, using one or more tower tie bolts to the foundation or to various masses.
  • this invention defines the possibility of making measurements of wind speed and direction to define the loads to be introduced in systems 1 and 2 defined above. This measurement is relevant since the structural system can receive significant wind loads and that are relevant to its stability.
  • this invention defines the possibility of measuring or estimating the position and value of the crane load at each moment and defining the load to be introduced to compensate for eccentric loads by means of systems 1 and 2 described above.
  • the force exerted by the cables is adjusted at all times to the value of the load supported by the crane to be used and the angular position of the load with respect to the horizontal line joining the vertical axes of! Structural system with the wind turbine tower.
  • the wind load calculated from! System 3 described above will also be considered.
  • the description of the crane to be used to be placed for the component change is not the object of this invention, any crane that allows fixing to the structural system and carrying out the planned maintenance and component change operations can be used.
  • this invention describes a method for hoisting a crane to the top of the structural system without the need to use a crane located on the ground that lifts the crane to be used to the top.
  • a type of crane is preferably proposed in which its main characteristic is that the boom of the crane can vary the angle it forms with the mast by actuating a cylinder, preferably hydraulic.
  • This crane mainly consists of a tubular mast that will be fixed to the structural system using specially designed parts for this purpose, a turning system located on the mast, a second mast that can rotate with respect to the first mast and that is fixed on its upper part the boom of the crane, the hook for the load at the end of the boom including the vertical movement of the load system and a hydraulic cylinder that regulates the inclination of the crane with respect to the mast, expanding or contracting and, therefore, regulating the height to which can be lifted as needed to cover the full range of the crane.
  • This type of crane is common in the industry. Based on this crane typology, this invention describes a method for lifting this crane to the operating position at the top of the structural system.
  • the crane to be used is initially placed at the base of the structural system with the boom as vertical as possible and in any case so that it is within the perimeter of the structural system and does not collide with any component during its vertical lifting.
  • the first modules of the structural system are mounted surrounding the crane. This is possible due to the great versatility of the described structural systems based on prefabricated tubular components.
  • This invention also reveals the possibility of placing the crane to be used inside the perimeter of the structural system once it is assembled. To do this, It introduces the crane to be used in the structural system on one side, provisionally dismantling the horizontal or diagonal elements that are necessary.
  • the boom crane will preferably be located at its lowest point and once the structural system elements that had been removed have been inserted and repositioned, the boom is positioned to the most vertical position, removing the structural system elements that are necessary.
  • the crane is lifted by using a series of cables that pass through pulleys located at the top of the structural system and return to make the shot from the bottom. It is also possible to make the shot from the top in which case it is not necessary to use pulleys that deviate the path of the cables.
  • the minimum number of cables to use is one, including in this case a hoisting tool, but the number can be increased to improve the crane's guidance during hoisting.
  • the cables will be fixed to the crane so that the center of gravity of the crane is centered and below the fixing points so that excessive tilting does not occur.
  • the crane can be loaded with additional masses to center the center of gravity if necessary.
  • the crane For guiding the crane during lifting it is possible to use different guiding systems. Preferably it is proposed to use wheels attached to the crane that roll on profiles expressly mounted for this purpose in the structural system. Alternatively, the crane can be guided by controlling its horizontal movement using a series of operator-controlled guide cables.
  • this invention describes that in the event that the maximum height of the structural system exceeds the naceile, this height will preferably be defined so that the crane to be used remains at its working height by means of the hoisting method described above and the crane is fixed to use the structural system by components that allow the transmission of the crane loads to be used in the structural system.
  • This invention describes that once the crane to be used is hoisted according to the method described above, the final hoisting of the crane to be used, if necessary, is carried out by means of one or more cylinders, preferably hydraulic. These cylinders will be fixed on the one hand to the mast of the crane to be used, preferably on its lower part to improve its stability, but it is also possible at other points, either directly or from intermediate supports. The second end of the cylinders will be fixed to one or more supports that will have been previously fixed to the structural system below the crane. This configuration is done with the cylinder with the stem retracted, so that when the cylinder expands, it moves the crane away from the support and raises it. The crane is vertically guided by the same system as in the first lift.
  • the crane will be hoisted the final meters using this method.
  • the crane to be used will be fixed to the structural system, either with cables, with the definitive connections or through other systems. Then the cylinder support can be released and raised so that the operation can be repeated.
  • the crane attachment to be used in the structural system is fixed by attaching the mast of the crane to different elements of the structural system at at least one height by joining plates, tubes or other specifically defined elements so that all stresses can be transmitted generated.
  • This invention discloses the fixing of the crane in more than one height, preferably in two heights, but they can be more, in order to better distribute the efforts in the structural system.
  • This invention describes the possibility of fixing the crane to be used directly to the wind turbine tower to transmit the horizontal stresses taking advantage of the greater rigidity of the tower compared to the proposed structural system.
  • the preparation of the connections to the tower by fixing pipes and with connection elements that do not transmit vertical stresses such as those described in this invention are especially indicated in this case.
  • Figure 1 shows an elevation view of a wind turbine, (in which for simplicity the blades have not been drawn), and a crane prepared for use supported by a structural system attached to the tower of the wind turbine.
  • Figure 2 shows an elevation and plan view of a structural system incorporating cables to compensate for eccentric and horizontal loads.
  • Figure 3 shows a plan view of a wind turbine (in which for simplicity the blades and nacelle have not been drawn), and a prepared crane supported by a structural system attached to the tower of the wind turbine.
  • Figure 4 shows a section of a tower with a tube fixed by a plate and flange to the tower to facilitate the fixing of the structural system to the tower of the wind turbine.
  • Figure 1 shows a horizontal axis wind turbine 1 in which tower 2 and nacelle 3 are seen and in which the blades have not been drawn for simplicity. Also shown is a crane 10 prepared for use in a component change or maintenance operation consisting of a lower mast 1 1, an upper mast 12, a slewing system 13, a boom 14 and a hydraulic actuator 15 that allows to regulate the inclination of the boom with the mast and with it the height of the load.
  • the crane 10 is fixed to a structural system 20 formed by precast elements as described in the description of the invention.
  • This structural system 20 is composed of several modules consisting mainly of uprights 21, horizontal components 22 and diagonals 23.
  • Figure 1 also includes brackets 24 that allow compensating for the taper of the tower for the access of the operators to the surface of the tower of safe way.
  • the structural system 20 is connected to the tower 2 by means of connection elements 30 that are connected to the tower at the connection points 31.
  • Figure 2 shows a structural system 20 in elevation and plan view, consisting of uprights 21 and horizontal elements 22. This figure does not represent either the tower or the necessary connection elements.
  • Figure 2 also shows vertical cables 41 fixed at the upper end of the structural system and at the bottom on the ground or at the base of the system.
  • the cable 41 is fixed at the upper end to a bracket 24 that protrudes from the vertical of the uprights.
  • Figure 2 also shows an inclined cable 42 that is fixed at the top in the structural system and at the base at a certain distance.
  • Figure 3 shows the plan view of a tower 2 of a wind turbine in the structural system 20 consisting mainly of uprights 21 and horizontal elements 22.
  • the main module of the structural system supports on its upper part the crane 10, whose mast is fixed to the main module of the structural system by means of special connection elements 16.
  • This structural system includes an additional module 320 formed by four columns of uprights 321 and horizontal elements 322.
  • This module includes platforms and access stairs, 26 through which to access the different heights of the structural system.
  • smooth tubes fixed by flanges 27 are used to join both modules and stiffen the structural system since the modular system described in this example does not have horizontal elements that adapt to the distance between studs defined in the configuration described.
  • Figure 4 shows a tower 2 of a wind turbine on which two plates 50 have been attached, including two flanges 51. These flanges allow a tube 60 to be fixed to the tower so that the connecting elements of the structural system to the tower of the wind turbine, not shown, can be connected to this tube, for example, by means of a flange. This allows a quick and easy fixing of the connection element of the structural system to the wind turbine tower.

Abstract

L'invention concerne un système structural modulaire formé d'éléments préfabriqués, principalement tubulaires, pour support d'une grue pour l'entretien ou le changement de composants d'une éolienne. Les éléments utilisés sont semblables à ceux des échafaudages ou cintres utilisés dans le secteur de la construction. Ce système ne nécessite pas de grues externes pour son montage. Le système structural est fixé à la tour de l'éolienne par une multitude d'éléments de liaison qui transmettent les efforts horizontaux. L'invention définit une série de formes pour préparer la tour afin de fixer le système structural et également une série de modifications à la coneption de la tour pour fixer ces liaisons de manière simple sur de futures tours d'éoliennes. L'invention concerne un procédé pour hisser la grue à utiliser sans avoir à utiliser de grues externes et concerne enfin un procédé pour compenser les charges électriques et horizontales que peut présenter le système structural.
PCT/ES2018/070629 2018-09-28 2018-09-28 Système et procédé pour l'entretien d'une éolienne WO2020065103A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2018/070629 WO2020065103A1 (fr) 2018-09-28 2018-09-28 Système et procédé pour l'entretien d'une éolienne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2018/070629 WO2020065103A1 (fr) 2018-09-28 2018-09-28 Système et procédé pour l'entretien d'une éolienne

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WO2020065103A1 true WO2020065103A1 (fr) 2020-04-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644557A1 (fr) * 2012-03-26 2013-10-02 Siemens Aktiengesellschaft Grue utilisant une structure de support
US20140034418A1 (en) * 2011-04-14 2014-02-06 Mantenimientos Electricos Campo De Aviacion, S.L. Repair/cleaning scaffolding tower for wind turbines
US20140102039A1 (en) * 2011-05-25 2014-04-17 Philipp Wagner Method of setting up, maintaining and disassembling a wind turbine
CA2999938A1 (fr) * 2015-10-01 2017-04-06 Lagerwey Wind B.V. Systeme de hissage pour l'installation d'une eolienne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140034418A1 (en) * 2011-04-14 2014-02-06 Mantenimientos Electricos Campo De Aviacion, S.L. Repair/cleaning scaffolding tower for wind turbines
US20140102039A1 (en) * 2011-05-25 2014-04-17 Philipp Wagner Method of setting up, maintaining and disassembling a wind turbine
EP2644557A1 (fr) * 2012-03-26 2013-10-02 Siemens Aktiengesellschaft Grue utilisant une structure de support
CA2999938A1 (fr) * 2015-10-01 2017-04-06 Lagerwey Wind B.V. Systeme de hissage pour l'installation d'une eolienne

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